The actor said he "mistakenly" shared the image, believing it related to an Israeli hospital bombing.
The boss of the Serpentine Galleries stands down after three years heading up the London institute.
TV host invited to appear before MPs investigating reality TV, following the death of a participant.
Russia has countered attempts to hack into its infrastructure, says Kremlin spokesman.
Successful night too for "strong female characters" at the Movie & TV Awards.
Watchdog receives hundreds of complaints about Maura allegedly harassing Tommy and contestants' treatment of Lucie.
The metal band have cancelled most of their forthcoming tour as Dave Mustaine undergoes treatment.
The company's boss Adam Mosseri tells Radio 1 Newsbeat he wants Instagram to be "less pressurised".
The maker of Watch Dogs: Legion wants it to help players “think differently about the person next to you”.
Nandi Bushell wowed the singer-songwriter when she posted videos of her skills on Instagram.